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Registered
Join Date: Sep 2002
Location: Seattle, Washington
Posts: 16
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Weber conversion on '76 912E
I did some searching and didn't find anything on this one so I'll post it here - hoping somebody can give me a pointer or two on converting my 1976 912E from injection to carbs.
As she sits, she has the standard 912E bosch injection and engine mgmt. I bought the car in non-running condition and half of the parts for the injection and engine mgmt are missing - rather than fight it I'd like to simplify things and just put on some 40 webers or dellortos and sell the injection stuff on craigslist to someone who may need it. So, my questions are: 1. Can I use the existing cams with carbs? Or is a different lobe profile needed for carbs? 2. What manifolds do I need? "twin port"? "upright"? I'm not so familar with these terms as I'm not an experienced vw airhead guy. 3. Is a weber 40idf about right? Or, 44s? I'm guessing 48IDAs are way too big. 4. What would the timing setting be for this engine with carbs? Idle, and maximum advance. 5. Any starting/baseline jetting suggestions? etube, idles, mains, etc. Thank you in advance for any help! |
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10-13-2009, 02:40 PM
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Join Date: Oct 1999
Posts: 8,673
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You might check in on the 914 forum, it's basically the same motor.
They'll have lots of ideas and answers. ...or stay here and drop a flat 6 in there. ha. |
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10-13-2009, 04:21 PM
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912bbs.org
Why not ask over at 912bbs.org there is a whole section devoted to the 912E, and lots of knowledgeable E owners there.
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10-13-2009, 04:23 PM
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Registered
Join Date: Sep 2002
Location: Seattle, Washington
Posts: 16
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Thank you gents - good suggestions, will do as you suggest.
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10-13-2009, 09:50 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,486
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what exactly is missing? you're better off with the injection system.
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10-14-2009, 04:19 AM
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Registered
Join Date: Jul 2005
Location: southern RI USA
Posts: 1,513
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A friend of mine just sold his beater 912E that had dual webers, flat top euro pistons, and a hotter cam.
It was pretty quick! I think you shouldn't stop at webers. I think you should go straight to aircooledtechnology.com and see the array of great engine configurations available for a carb'd 912E/914. Raby also has an EFI retrofit kit that delivers 135 bhp with his 2056cc street engine...
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Sepia brown 1971 911T. |
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10-14-2009, 06:17 AM
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Hell Belcho
Join Date: Sep 2006
Location: Oz
Posts: 9,251
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I'm pretty familar with the Type 4. Without doing internal mods like changing the cam and head work, it would be sort of pointless. You would get worse mileage, it would have cold running problems and then you have to deal with figuring out a different ignition setup.
Honestly, take the time to fix the L-jet on the car. It's MUCH better than carbs. Fixing vacuum leaks are the main issue usually. What is missing off the engine? A lot of the parts are the same as the VW bus of the same era.
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10-14-2009, 06:52 AM
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